Streptococcus pneumonia is the leading cause of bacterial pneumonia. It can enter your lungs through inhalation or through your bloodstream. There is a vaccination for this type. Haemophilus influenzae is the second most common cause of bacterial pneumonia.
The droppings are similar in color to the wood residue that the insects spill as they eat. Subterranean termite droppings are soft and used in constructing nests, whereas drywood termite droppings are hard and look like piles of sawdust, according to Extension.org.
Here you can see bat droppings sized by a pen. Bat droppings (guano) are very dangerous to humans. They looks similar to mouse droppings, but when touched they break apart into a powdery substance. This powder then becomes airborne, and once inhaled it can cause a terrible respiratory disease called Histoplasmosis. Histoplasmosis is the most severe danger of bat droppings, but disease is not the only risk.